Quote:
Originally Posted by nikitopo
Nit picking topics. Noone said about peak torque. Would you have the same 1/4-mile trap speed with a turbo car having same peak power? Can you have a simple formula to fit all the cases? Answer is NO, because with turbo you can have a much more flatter torque curve. Same about NA engines since each one has a different torque curve. We are not in the 80's or 90's where a simple formula usage might be okayish. We can have nowadays detail simulations with pretty much most of the parameters that count. But anyways, it is pretty funny going always to the very basic discussions.
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Well technically your torque curve in a turbo engine would likely not be flat at all! But in any case, power is still the defining factor. The reason a 1/4 trap time is likely faster in a turbo car of about the same weight compared to an NA car is because it has more POWER through most of the rev range. But, if you were to actually take 2 very close examples (very similar weight cars with very similar peak power, same drivetrain, same tires, one turbo, one NA), I would guarantee you the 1/4 trap will actually be quite close. That's because once an NA car gets going, it spends most of its time at the peak of its power band, where it will match the turbo car acceleration.